1v08

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[[Image:1v08.gif|left|200px]]<br />
 
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<applet load="1v08" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1v08, resolution 1.90&Aring;" />
 
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'''CRYSTAL STRUCTURE OF THE ZEA MAZE BETA-GLUCOSIDASE-1 IN COMPLEX WITH GLUCO-TETRAZOLE'''<br />
 
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==Overview==
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==Crystal structure of the Zea maze beta-glucosidase-1 in complex with gluco-tetrazole==
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Plant beta-glucosidases play a crucial role in defense against pests. They, cleave, with variable specificity, beta-glucosides to release toxic, aglycone moieties. The Sorghum bicolor beta-glucosidase isoenzyme Dhr1 has, a strict specificity for its natural substrate dhurrin, (p-hydroxy-(S)-mandelonitrile-beta-D-glucoside), whereas its close, homolog, the maize beta-glucosidase isoenzyme Glu1, which shares 72%, sequence identity, hydrolyzes a broad spectrum of substrates in addition, to its natural substrate, 2-O-beta-D-glucopyranosyl-4-hydroxy-7-methoxy-1,4-benzoxaxin-3-one., Structural data from enzyme.substrate complexes of Dhr1 show that the mode, of aglycone binding differs from that previously observed in the, homologous maize enzyme. Specifically, the data suggest that Asn(259), Phe(261), and Ser(462), located in the aglycone-binding site of S. bicolor, Dhr1, are crucial for aglycone recognition and binding. The tight binding, of the aglycone moiety of dhurrin promotes the stabilization of the, reaction intermediate in which the glycone moiety is in a deformed (1)S(3), conformation within the glycone-binding site, ready for nucleophilic, attack to occur. Compared with the broad specificity maize, beta-glucosidase, this different binding mode explains the narrow, specificity of sorghum dhurrinase-1.
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<StructureSection load='1v08' size='340' side='right'caption='[[1v08]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1v08]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Zea_mays Zea mays]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V08 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1V08 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NTZ:NOJIRIMYCINE+TETRAZOLE'>NTZ</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1v08 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1v08 OCA], [https://pdbe.org/1v08 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1v08 RCSB], [https://www.ebi.ac.uk/pdbsum/1v08 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1v08 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/HGGL1_MAIZE HGGL1_MAIZE] Is implicated in many functions such as ABA metabolism, hydrolysis of conjugated gibberellins, conversion of storage forms of cytokinins to active forms. Also acts in defense of young plant parts against pests via the production of hydroxamic acids from hydroxamic acid glucosides. Enzymatic activity is highly correlated with plant growth. The preferred substrate is DIMBOA-beta-D-glucoside. Hydrolyzes the chromogenic substrate 6-bromo-2-naphthyl-beta-D-glucoside (6BNGlc) and various artificial aryl beta-glucosides. No activity with cellobiose, arbutin, gentiobiose, linamarin or dhurrin as substrates.<ref>PMID:10099619</ref> <ref>PMID:16668611</ref> <ref>PMID:10099619</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/v0/1v08_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1v08 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Plant beta-glucosidases play a crucial role in defense against pests. They cleave, with variable specificity, beta-glucosides to release toxic aglycone moieties. The Sorghum bicolor beta-glucosidase isoenzyme Dhr1 has a strict specificity for its natural substrate dhurrin (p-hydroxy-(S)-mandelonitrile-beta-D-glucoside), whereas its close homolog, the maize beta-glucosidase isoenzyme Glu1, which shares 72% sequence identity, hydrolyzes a broad spectrum of substrates in addition to its natural substrate 2-O-beta-D-glucopyranosyl-4-hydroxy-7-methoxy-1,4-benzoxaxin-3-one. Structural data from enzyme.substrate complexes of Dhr1 show that the mode of aglycone binding differs from that previously observed in the homologous maize enzyme. Specifically, the data suggest that Asn(259), Phe(261), and Ser(462), located in the aglycone-binding site of S. bicolor Dhr1, are crucial for aglycone recognition and binding. The tight binding of the aglycone moiety of dhurrin promotes the stabilization of the reaction intermediate in which the glycone moiety is in a deformed (1)S(3) conformation within the glycone-binding site, ready for nucleophilic attack to occur. Compared with the broad specificity maize beta-glucosidase, this different binding mode explains the narrow specificity of sorghum dhurrinase-1.
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==About this Structure==
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Structural determinants of substrate specificity in family 1 beta-glucosidases: novel insights from the crystal structure of sorghum dhurrinase-1, a plant beta-glucosidase with strict specificity, in complex with its natural substrate.,Verdoucq L, Moriniere J, Bevan DR, Esen A, Vasella A, Henrissat B, Czjze M J Biol Chem. 2004 Jul 23;279(30):31796-803. Epub 2004 May 17. PMID:15148317<ref>PMID:15148317</ref>
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1V08 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Zea_mays Zea mays] with NTZ as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Beta-glucosidase Beta-glucosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.21 3.2.1.21] Structure known Active Site: AC1. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1V08 OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Structural determinants of substrate specificity in family 1 beta-glucosidases: novel insights from the crystal structure of sorghum dhurrinase-1, a plant beta-glucosidase with strict specificity, in complex with its natural substrate., Verdoucq L, Moriniere J, Bevan DR, Esen A, Vasella A, Henrissat B, Czjze M, J Biol Chem. 2004 Jul 23;279(30):31796-803. Epub 2004 May 17. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15148317 15148317]
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</div>
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[[Category: Beta-glucosidase]]
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<div class="pdbe-citations 1v08" style="background-color:#fffaf0;"></div>
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[[Category: Single protein]]
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[[Category: Zea mays]]
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[[Category: Bevan, D.R.]]
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[[Category: Czjzek, M.]]
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[[Category: Esen, A.]]
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[[Category: Henrissat, B.]]
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[[Category: Moriniere, J.]]
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[[Category: Verdoucq, L.]]
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[[Category: NTZ]]
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[[Category: 3d-structure]]
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[[Category: beta-glucosidase]]
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[[Category: chloroplast]]
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[[Category: dimboa-glucoside]]
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[[Category: family gh1]]
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[[Category: glycoside hydrolase]]
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[[Category: hydrolase]]
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[[Category: inhibitor]]
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[[Category: pest defense]]
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[[Category: transit peptide]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 5 14:47:13 2007''
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==See Also==
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*[[Beta-glucosidase 3D structures|Beta-glucosidase 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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[[Category: Zea mays]]
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[[Category: Bevan DR]]
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[[Category: Czjzek M]]
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[[Category: Esen A]]
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[[Category: Henrissat B]]
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[[Category: Moriniere J]]
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[[Category: Verdoucq L]]

Current revision

Crystal structure of the Zea maze beta-glucosidase-1 in complex with gluco-tetrazole

PDB ID 1v08

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